Interference of two electrons entering a superconductor
F. W. J. Hekking, Yu.V. Nazarov
TL;DR
This paper investigates the interference effects of two-electron tunneling in a normal-superconductor junction, highlighting the role of phase coherence and proposing experimental setups to observe Aharonov-Bohm and Josephson phenomena.
Contribution
It provides a theoretical evaluation of interference effects in NS junctions and suggests experimental layouts to observe significant quantum interference phenomena.
Findings
Interference significantly affects subgap conductance.
Proposed experimental setups to observe Aharonov-Bohm and Josephson effects.
Highlights the role of phase coherence in electron tunneling.
Abstract
The subgap conductivity of a normal-superconductor (NS) tunnel junction is thought to be due to tunneling of two electrons. There is a strong interference between these two electrons, originating from the spatial phase coherence in the normal metal at a mesoscopic length scale and the intrinsic coherence of the superconductor. We evaluated the interference effect on the transport through an NS junction. We propose the layouts to observe drastic Aharonov-Bohm and Josephson effects.
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